How to check user inside bash script and run as another user

Question

I always want to run a script as user1, but the code flow always runs it as root. So, I want to check the current user inside the script. If it is root, I want to run the rest of the script as user1.

I want to do something similar to this. But only difference is I need to run the script as a particular user (say user1). So, when I find that the current user is not user1, I do not want to exit but want to run rest of the shell script as user1. How can I achieve this?

It shouldn't really matter who runs the script. If it needs to run as user1, it should be on the caller to ensure that happens. — chepner
– chepner, Commented May 22, 2021 at 14:17

Kalyanam Rajashree · Accepted Answer · 2021-05-22 09:29:38Z

2

Thanks @User123. But I was facing some issues with that solution as there are many functions and variables in the script. Not sure what the problem exactly is. But, this worked for me now:

 if [ $USER == <undesired user> ]; then
  echo Current user is $USER. Running the script as <desired user>
  su -c 'sh <script.sh>' <desired user>
 else
  echo Current user is $USER
  ...
  <rest of the script>
  ...
 fi

answered May 22, 2021 at 9:29

Kalyanam Rajashree

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